The amino acids 5-hydroxytryptophan (5-HTP) and l-tryptophan are precursors of serotonin. 5-HTP is generally recommended over l-tryptophan because it crosses the blood-brain barrier at a higher rate, ...
5-Hydroxytryptophan —commonly known as 5-HTP—is a compound made naturally in the body. 5-HTP is created as a byproduct of the amino acid L-tryptophan. Our bodies don’t make L-tryptophan naturally—we ...
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